The sub clock system is also called clock system, standard time synchronization system and so on. The sub clock system is a time service system composed of a clock and a clock. The clock used by the neutron clock to display the time in the clock system is the time server. The time server can receive GPS, Beidou, GLONASS, and other satellite signals as standard time signals, providing accurate time signals for computers, clocks, monitoring devices, weak electronic systems, alarm systems and other devices, and ensures the unification of the time of all devices. 。

The sub clock system is made up of the clock and time server. The time service is accurate and the time is uniform. The time server can monitor the time of each device accurately. This greatly saves a lot of manpower and material costs, and also avoids some problems caused by the inconsistency of time and time. It is very important for them whether the time is accurate in hospitals and military industry. For example, if the hospital time is not unified, it may affect the inaccuracy of operation time and outpatient time, because there will be a series of problems. But in military industry and army, because time is not allowed, it will bring many problems. Therefore, the parent clock system can solve the above problems in a comprehensive way.

At present, most of the mother clock system is transmitting the time information through the network form. Such a way of timing the network can cover many devices, and the time accuracy can reach the time error of 0.5-10ms, and it is convenient to use. It only needs SYN108 type GPS Beidou dual-mode time line receiving satellite signal to transmit to the clock NTP network time server, SYN2102NTP network time server. After receiving the satellite signal, the signal is transformed into network time information, serial port time information and 1PPS time information (synchronization error is less than 30ns) and so on. Finally, the network signal is transmitted to the network switch, and then transmitted to Zi Zhong SYN6109NTP network sub clock and multiple terminal equipment. Time server can monitor the time of each device, and support windows, LINUX, UNIX, SUN SOLARIS, IBM AIX and other operating systems. It also has batch software, firewall, hardware and software watchdog and timekeeping function. The built-in high precision temperature compensation crystal oscillator can choose constant temperature crystal oscillator and rubidium atomic clock, and the time keeping function can achieve accurate time when receiving satellite signals.

When the parent clock system is used, it will also choose different Zi Zhong according to the environment. For example, SYN6106 type NB-IoT couplet net clock, SYN6103 CDMA sub clock, SYN6107 type GPS Beidou double mode clock, SYN6123 type wireless WIFI clock, SYN6101 RS485 sub clock, these sub clocks can receive the Internet of things, CDMA clock, RS485, and other signals to give time. The size of the above clock has many sizes to choose from. Our sub clock uses acrylic panels and titanium aluminum alloy frames for durability. The use of high brightness digital tube displays beautiful appearance, and the battery is equipped with batteries, which can operate continuously for 72 hours under power failure.

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